with t as( select emp_no, birth_date, first_name, last_name, gender, hire_date, dense_rank() over(order by hire_date desc)as hire_rank from employees) select emp_no, birth_date, first_name, last_name, gender, hire_date from t where hire_rank=3
rank()相同数值排序相同,跳过下一个序数;
dense_rank()相同数值排序相同,不跳过下一个序数。